Slider in a slide fastener



Jan. 29, 1963 R. w. SIMBERG SLIDER IN A SLIDE FASTENER Filed Sept. 6, 1960 ROLF WALTER SIMBEAG U ited States This invention relates to a slide fastener and more particularly to a slider for slide fasteners having two stringers with a series of spaced, interlockable elements.

The invention essentially comprises a slider for slide fasteners having a top plate and a bottom plate spacedly interconnected at one end by a wedge piece. A Y-s-haped channel for holding the stringers is formed by the wedge piece and side projections at the top plate and bottomplate, respectively.

On the end opposite the wedge piece, the top plate is provided with a cut-out for the drag tongue. This drag tongue is pivoted onto the slider top plate by means of bearing pins which engage into bearing openings in the top plate, according to the preferred embodiment of the invention. The bearing openings are open toward the inside of the slider so that the drag tongue can be inserted from there. Once sitting in the upper portion of the hearing opening the drag tongue will be kept in place by the stringers underneath.

It is the principal object of the invention to provide a slider of simple construction which is reliable in use.

Another object of this invention is to reduce the number of parts and the amount of labor heretofore needed for the manufacture of sliders in slide fasteners.

An additional object of this invention is to minimize the need for high accuracy of the parts of the improved slider and consequently to allow a substantial degree of tolerance of its parts.

A further object of the present invention is to make the drag tongue of the slider easily insertable and removable.

Other objects and advantages of the invention will be apparent from the following description in conjunction with the accompanying drawings, in which like reference numerals refer to like parts throughout the several figures, and wherein FIGURE 1 is a perspective view of the preferred embodiment of the slider;

FIGURE 2 shows a side view and partial section of the slider;

FIGURE 3 shows a section of the slider taken along line IIIIII in FIGURE 2;

FIGURE 4 is a longitudinal section of the slider equipped with stringers;

FIGURE 5 is a side View of the drag tongue;

FIGURE 6 is a plan view of the drag tongue seen from the inside of the slider;

FIGURE 7 shows schematically the pivoting of the drag tongue relative to the slider; and

FIGURE 8 is a sectional side view of a modification of the slider.

Referring now to the drawings more in particular, FIG- URE 1 shows the slider which consists of the slider body 1 and the drag tongue 2. The top plate 3 and the bottom plate 4 are spacedly interconnected by the wedge piece 5. The side projections 6 and 7 at the top and bottom plate, respectively, serve as guiding edges for the stringers when the slider is in operation.

FIGURE 2 illustrates the slanting elevation 9 of the drag tongue, by which elevation the drag tongue is supported in uplitted form upon assembly.

FIGURE 3 clearly shows the cut-out 8, the stepped surfaces 10 of the top plate, the wedge piece 5 and the bearing openings 11.

atent" FIGURE 4 illustrates the drag tongue 2 after assembly into the slider which is combined here with the stringers having chain elements 14 and supporting laces 16. It is evident from FIGURES 4 and 1 that the width of the cutout 8 is practically equal to the width of the drag tongue 2.

However, the width of the cut-out 8 is less than the dis tance between the edges of the side projections 6 of the top plate 3 in that stepped surfaces 10 (FIG. 3) are formed which are at right angles to the inner edges of the side projections 6.

FIGURE 5 shows how the drag tongue 2 is provided with a known latch clip 13 and a groove 15 for holding a spring in a known manner, which spring is used to urge the drag tongue downwardly at all times.

FIGURE 6 shows the arrangement of the latch clip 13, seen from the underside of the drag tongue 2 and how the bearing pins 12 project therefrom, by means of which pins the drag tongue 2 is pivotally journalled in bearing openings 11 (FIG. 3).

The effect of the slanting elevation 9 upon insertion of the drag tongue 2 is schematically illustrated in FIGURE 7. A part of the top plate 3 is shown here in a longitudinal, vertical section together with the end of the drag tongue 2. In the position shown by whole lines, the drag tongue 2 is placed between the. top plate 3 and the bottom plate 4 underneath the bearing openings 11. The distance :from'the center of the bearing pins 12 to the end of the drag tongue 2 is designated by letter In. The lower edge of the curved or slanting surface 9 is positioned at distance n from the center aXis of the bearing openings. The dis tance n has been chosen to be longer than the distance In in order that the positioning of the drag tongue may take place from the position shown by whole lines in its pivotal position, wherein the bearing pins 12 will be positioned at the bottom of the bearing opening 11. In assembling the slide fastener, the drag tongue is turned to a position shown by the broken lines, or to a position somewhat further inclined. When the distances 1 and r, shown in FIG- URE 7 have been chosen so as to be practically equal, the drag tongue engages surface 9. The drag tongue will stay in this position without being held there and the stringers of the fastener may be inserted into the wide channels of the slider. The distance r may also be a little longer than the distance p, as shown in FIGURE 7. In this case, the drag tongue 2 can he moved a little further down, until the surface 9 stops it. On account of the bearing openings 11 being greater than the distance m, the positioning of the stringers of the fastener is even possible in this situation. This means that greater productional tolerances and reduced costs in the production are attained owing to a simplified construction.

The modification of the slider shown in FIGURE 8 has bearing pins .18 at the side walls of the cut-out in the top plate 3 and an upwardly inclined curved hearing at the upper end 17 of the drag tongue, which bearing is open toward the front side of the drag tongue.

The slider according to the present invention is of very simple construction since it consists only of two parts, i.e., the slider body and the drag tongue. Assembling of the slider is carried out simply by placing that end of the drag tongue on which the bearing pins are positioned, into the cut-out 8 so that the pins 12 will be journal-led in the bearing openings 11.

Once the drag tongue 2 has been inserted, it is supported in bearing position by the stringers inside the slider.

The slider according to the present invention is most reliable in use and can be produced at low cost. The assembling oat all the parts can be done very fast with simple tools, and there is no need for any finishing processes. Its assembling and replacement of the parts are also most simple.

' the scope of the appended claims.

aoraeeo It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions, and, accordingly, it is desired to comprehend such modifications Within this invention as may fall within What is claimed is: V

1. A slider for slide fasteners of the type having two stringers with a series of spaced, interlockable elements, said slider comprising a body having a top plate and a bottom plate, a Wedge piece spacedly connecting said plates at one end, said top plate having a central cu-t ou-t open at the end opposite said wedge piece, hold ng means at the side edges of said cut-out and a curved wall at the top end of said cut-out, a drag tongue fitting into said cutout and having engaging means for being pivotally journalled in said holding means, the lower end of said curved wall being slightly recessed from said holding means so as to leave suilicientspace for the rear end of said drag tongue, and a latch clip for engaging said stringers.

2. A slider tor slide fastener-s as claimed in claim 1, wherein the engaging means at said drag tongue are laterally extending hearing pins and the holding means at the side edges of said cut-out in the top plate are bearing openings which are open toward the under side of the plate to facilitate the assembly of said drag tongue into said slider.

3. A slider for slide fasteners as claimed in claim 1, wherein the engaging means at said drag tongue are an upwardly inclined hearing at the upper end of said tongue, said bearing being open toward the front side of the drag tongue, and the holding means at the side edges of said cut-out are hearing pins inwardly projecting therefrom,

said pin-s pivotally engaging said bearing in said drag tongue.

4. A slider for slide fasteners of the type having two stringers with a series of spaced, interlockable elements, said slider comprising a body having a top plate and a bottom plate, a wedge piece spacedly connecting said plates at one end, said top plate having a central cut-out open at the end opposite said wedge piece, there being bearing openings at the side edges of said cut-out, said bearing openings being open toward the underside of said top plate, a curved wall at the top end of said cut-out, and a drag tongue fitting into said cut-out and having later ally extending bearing pins, said curved Wall supporting said drag tongue in uplifted form, said drag tongue being pivo tally journalled in said bearing openings by means of said pins, and the distance between the central axis through said hearing pins and the rear end of said drag tongue being shorter than the distance between the central axis through said bearing pins and the lowest end of said curved wall.

5. A slider for slide fasteners as claimed in claim 4, wherein said bottom plate has side projections and said top plate stepped surfaces for guiding the stringers of the slide fasteners. 

1. A SLIDER FOR SLIDE FASTENERS OF THE TYPE HAVING TWO STRINGERS WITH A SERIES OF SPACED, INTERLOCKABLE ELEMENTS SAID SLIDER COMPRISING A BODY HAVING A TOP PLATE AND A BOTTOM PLATE, A WEDGE PIECE SPACEDLY CONNECTING SAID PLATES AT ONE END, SAID TOP PLATE HAVING A CENTRAL CUT-OUT OPEN AT THE END OPPOSITE SAID WEDGE PIECE, HOLDING MEANS AT THE SIDE EDGES OF SAID CUT-OUT AND A CURVED WALL AT THE TOP END OF SAID CUT-OUT, A DRAG TONGUE FITTING INTO SAID CUTOUT AND HAVING ENGAGING MEANS FOR BEING PIVOTALLY JOURNALLED IN SAID HOLDING MEANS, THE LOWER END OF SAID CURVED WALL BEING SLIGHTLY RECESSED FROM SAID HOLDING MEANS SO AS TO LEAVE SUFFICIENT SPACE FOR THE REAR END OF SAID DRAG TONGUE, AND A LATCH CLIP FOR ENGAGING SAID STRINGERS. 